DESIGN AND CONSTRUCTION OF A STEREO HEADPHONE AMPLIFIER
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TITLE PAGE
DESIGN AND CONSTRUCTION OF A STEREO HEADPHONE AMPLIFIER
BY
---
EE/H2013/01430
DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING
SCHOOL OF ENGINEERING
INSTITUTE OF ---
DECEMBER,...
APPROVAL PAGE
This is to certify that the research work, "design and construction of a stereo headphone amplifier" by ---, Reg. No. EE/H2007/01430 submitted in partial fulfillment of the requirement award of a Higher National Diploma on Electrical and Electronics Engineering has been approved.
By
Engr. --- Engr. ---
Supervisor Head of Department.
Signature………………. Signature……………….
……………………………….
Engr. ---
External Invigilator
DEDICATION
This project is dedicated to Almighty God for his protection, kindness, strength over my life throughout the period and also to my --- for his financial support and moral care towards me.Also to my mentor --- for her academic advice she often gives to me. May Almighty God shield them from the peril of this world and bless their entire endeavour Amen.
ACKNOWLEDGEMENT
The successful completion of this project work could not have been a reality without the encouragement of my --- and other people. My immensely appreciation goes to my humble and able supervisor mr. --- for his kindness in supervising this project.
My warmest gratitude goes to my parents for their moral, spiritual and financial support throughout my study in this institution.
My appreciation goes to some of my lecturers among whom are Mr. ---, and Dr. ---. I also recognize the support of some of the staff of --- among whom are: The General Manager, Deputy General manager, the internal Auditor Mr. --- and the ---. Finally, my appreciation goes to my elder sister ---, my lovely friends mercy ---, ---, --- and many others who were quite helpful.
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Headphone amplifier drives headphones instead of loudspeakers. Most commonly they are found embedded in electronic devices such as integrated amplifiers, portable music players and televisions, but standalone units are not uncommon.Headphone amplifier can provide the voltage levels necessary to drive the headphones. Most headphone amplifiers provide power between 10 mW and 2 W depending on the specific headphone being used and the design of the amplifier. Certain high power designs can provide up to 6W of power into low impedance loads, although the benefit of such power output with headphones is unclear, as the few headphones that have sufficiently low sensitivities to function with such power levels will reach dangerously high volume levels with such amplifiers.
CHAPTER ONE
1.1 INTRODUCTION
A headphone amplifier is a low-powered audio amplifier designed particularly to drive headphones worn on or in the ears, instead of loudspeakers in speaker enclosures. Most commonly, headphone amplifiers are found embedded in electronic devices that have a headphone jack, such as integrated amplifiers, portable music players (e.g., iPods), and televisions.Effectively, a headphone amplifier is a small power amplifier that can be connected to a standard headphone jack or the line output of an audio source. Electrically, a headphone amplifier can be thought of as an amplifier that presents a very high input impedance and presents a lower output impedance and larger range of output voltages. This allows headphones of a low sensitivity to be driven louder as a result of the extra voltage provided by the amplifier. There is potential fidelity gains if headphones are driven with lower distortion than using a headphone amplifier integrated into a general purpose audio product. In practice, this most often occurs when using low impedance headphones with consumer electronics with insufficiently low output impedance.
1.2 OBJECTIVE OF THE PROJECT
The objective is to design a benchmark performance and low cost amplifier used in powering headphone. Headphone amplifiers are found embedded in electronic devices that have a headphone jack, such as integrated amplifiers, portable music players, and televisions.
1.3 SIGNIFICANCE OF THE PROJECT
Just like a good room speaker can improve when partnered with a great power amp, a headphone is a miniature speaker system that can benefit from a headphone amp to sound its best.
With headphones, an uncompressed music source and a great headphone amp, you'll be astonished at the level of pure clarity, huge dynamic range and deep musical detail you'll be able to hear.
Big speaker systems may out-perform headphones in terms of visceral sonic impact; great headphones can deliver much superior audio resolution and access to nuanced low-level information obscured in the recording.
1.4 APPLICATION OF THE PROJECT
This device is found embedded in electronic devices such as integrated amplifiers, portable music players and televisions, for the listen pleasure of the user.
1.5 SCOPE OF THE PROJECT
This headphone amplifier circuit design is normally used to drive a headphone with relative low impedance. It provides one watt power output and it can also be applied as an output stage for preamplifiers in conjunction with active loudspeakers boxes. The headphone amp is composed of an OP-AMP and an additional transistor amplifier. Input signals pass through a low pass filter composed of resistor and capacitor. Its amplification together with a relatively “fast” OPAMP provides a low distortion .
1.6 PROJECT ORGANISATION
The work is organized as follows: chapter one discuses the introductory part of the work, chapter two presents the literature review of the study, chapter three describes the methods applied, chapter four discusses the results of the work, chapter five summarizes the research outcomes and the recommendations.
CHAPTER TWO: The complete chapter two of “design and construction of a stereo headphone amplifier” is available. Order full work to download. Chapter two of “design and construction of a stereo headphone amplifier” consists of the literature review. In this chapter all the related work on “design and construction of a stereo headphone amplifier” was reviewed.
CHAPTER THREE: The complete chapter three of “design and construction of a stereo headphone amplifier” is available. Order full work to download. Chapter three of “design and construction of a stereo headphone amplifier” consists of the methodology. In this chapter all the method used in carrying out this work was discussed.
CHAPTER FOUR: The complete chapter four of “design and construction of a stereo headphone amplifier” is available. Order full work to download. Chapter four of “design and construction of a stereo headphone amplifier” consists of all the test conducted during the work and the result gotten after the whole work
CHAPTER FIVE: The complete chapter five of design and construction of a “design and construction of a stereo headphone amplifier” is available. Order full work to download. Chapter five of “design and construction of a stereo headphone amplifier” consist of conclusion, recommendation and references.
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